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Unauthorized 401 error when connecting to Dynamics CRM 365 OData using Postman

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I Have a trial license for Dynamics 365 CRM online. I can connect from office 365 to the url of the Crm service in IE Explorer as:

myorg.crm4.dynamics.com
The url is like this
Also I can access Odata as:

myorg.crm4.dynamics.com/.../accounts

I try to connect to the Odata service using Postman.I created an application in azure with permissions to CRM as described here
I get an access_token, so this insure that the resource is valid.
I tried to do GET request to the resource using this valid access_token but postman respond with 401 Unauthorized
I read tens of pages but it can't help. I suspect (but not sure) that Odata service may not available in the trial version for developers.

The Question:
What I missed to run that example and connect to OData service?
Why I get the error Unauthorized 401 although i pass a valid access_token generated for the service myorg.crm4.dynamics.com

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Nishant Rana 11,323 Microsoft Employee on at

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RE: Unauthorized 401 error when connecting to Dynamics CRM 365 OData using Postman

This might help

nishantrana.me/.../
Community Member on at

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RE: Unauthorized 401 error when connecting to Dynamics CRM 365 OData using Postman

Yes, I did, click the button that says use the token.

even I try in the browser to call it using the generated accesss_token as : https://myorg....?access_token=<my-generated-access-token-here>
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Kokulan 18,054 on at

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RE: Unauthorized 401 error when connecting to Dynamics CRM 365 OData using Postman

Once you generated the token, are you clicking on the button that says use the token?

Also make sure the request header has the token added?